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More Problems for Fortinet: Critical FortiSIEM Flaw Exploited

ID: 7f4a0003-3510-5362-a1ee-a577ce830107

STIX ID: report--7f4a0003-3510-5362-a1ee-a577ce830107

Feed Name: Dark Reading

Threat Score
90/100

Date Published: 2026-01-16

Date Updated: 2026-04-21

Author: Rob Wright

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A critical FortiSIEM vulnerability (CVE-2025-64155, CVSS 9.4) enabling unauthenticated remote code execution was disclosed and a public proof-of-concept was published; multiple actors were observed exploiting the flaw in the wild, prompting Fortinet to issue patches and recommend limiting access to the phMonitor service (port 7900).

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